Sheet of material having a textured top surface upon which devices including snowboards and skis slide



FIG. 1 is a top view of a sheet of material having a textured top surface upon which devices including snowboards and skis slide showing my new design; and,

FIG. 2 is a top view of a second embodiment thereof.

The broken line boundaries that are shown in the drawings and the areas that are within the broken line boundaries do not form part of the claimed design. 

The ornamental design for a sheet of material having a textured top surface upon which devices including snowboards and skis slide, as shown and described. 